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| Number | Title | Issue Date |
| 4711763 | Sulfidation-resistant Co-Cr-Ni alloy with critical contents of silicon and cobalt Disclosed is a sulfidation-resistant alloy. The alloy preferably may contain about 27% each cobalt and chromium, 8% iron, 2.7% silicon and the balance nickel plus normal impurities found in alloys of this class. The alloy is eminently suitable for applications... | 12/08/1987 |
| 4678523 | Corrosion- and wear-resistant duplex steel Disclosed is a "duplex" stainless steel especially suited for use in conditions requiring a high degree of wear and corrosion resistance; for example structural fasteners, such as nuts and bolts as used in chemical processing. The alloy typically contains... | 07/07/1987 |
| 4533414 | Corrosion-resistance nickel alloy A nickel-base alloy containing principally chromium molybdenum and tungsten is disclosed. The alloy is especially resistant to corrosion in a variety of corrosive media including oxidizing acids and reducing acids; furthermore, the alloy is not subject to... | 08/06/1985 |
| 4526749 | Tantalum-columbium-molybdenum-tungsten alloy Disclosed is a novel refractory metal alloy that retains the essential characteristics of pure tantalum and, additionally, has improved engineering characteristics and may be produced at a lower cost than pure tantalum. The alloy nominally contains, by we... | 07/02/1985 |
| 4489040 | Corrosion resistant nickel-iron alloy Disclosed is an alloy eminently suited for use as a tubular product in deep, sour gas operations. The alloy has an optimum combination of corrosion resistance, high strength in the cold worked condition and resistance to sulfide stress cracking and stress... | 12/18/1984 |
| 4487630 | Wear-resistant stainless steel A high chromium stainless steel especially suited for use as wear (galling) resisting components, for example, valve parts. A typical alloy generally contains chromium, nickel, silicon, carbon, an effective cobalt content and the balance iron plus normal ... | 12/11/1984 |
| 4476091 | Oxidation-resistant nickel alloy Disclosed is an oxidation resilient nickel alloy containing chromium, tungsten and molybdenum in a critical relationship that provides a combination of engineering properties including a high degree of dynamic oxidation resistance and superior strength. T... | 10/09/1984 |
| 4465159 | Nonlinear ear protecting device An ear protecting device for protecting a wearer from annoying and/or damaging noise levels. The device is comprised of a connecting member and a pair of muffs suitable for covering a wearer's ears. The muffs are suspended from opposite portions of the co... | 08/14/1984 |
| 4464206 | Wrought P/M processing for prealloyed powder A process for producing a wrought product of improved ductility from substantially noncompactible prealloyed metal powder. The process comprises the steps of: comminuting substantially noncompactible prealloyed metal powder so as to flatten the particles ... | 08/07/1984 |
| 4464205 | Wrought P/M processing for master alloy powder A powder metallurgical process for producing a wrought product characterized by a low level of residual impurities. The process comprises the steps of: comminuting metal powder to effect a reduction in particle size, at least 60% of the comminuted particl... | 08/07/1984 |
| 4461290 | Hearing protectors There is disclosed herein a hearing protector structure comprising a generally U-shaped spring headband and a pair of ear canal obturating elements articulatingly affixed to the end portions of the headband. The hearing protector of the invention is posse... | 07/24/1984 |
| 4460542 | Iron-bearing nickel-chromium-aluminum-yttrium alloy A high temperature oxidation resistant alloy. The alloy consists essentially of, by weight, from 14 to 18% chromium, from 4 to 6% aluminum, from 1.5 to 8% iron, a small but effective yttrium content not exceeding 0.04%, up to 12% cobalt, up to 1% manganes... | 07/17/1984 |
| 4459707 | Ear protecting device An ear protecting device for protecting a wearer from annoying and/or damaging noise levels. The device is comprised of a connecting member and a pair of muffs suitable for covering a wearer's ears. The muffs are suspended from opposite portions of the co... | 07/17/1984 |
| 4458741 | Method of aspiration casting A method for forming metal articles, such as rods and tubes by aspiration casting is provided in which a hollow frangible mold, such as a glass tube, is immersed at one end in a molten metal bath, a vacuum is applied to the other end controlled with respe... | 07/10/1984 |
| 4450007 | Process for electroslag remelting of manganese-base alloys An electroslag remelting process for manganese-base alloys. The process includes the steps of: partially immersing a consumable electrode of a manganese-base alloy in a layer of molten slag and passing current between the consumable electrode and a second... | 05/22/1984 |
| 4439248 | Method of heat treating NICRALY alloys for use as ceramic kiln and furnace hardware This invention relates to components of ceramic kiln and furnace hardware made of NICRALY alloys. Disclosed is a method of heat treating NICRALY alloys to obtain a uniform film of desired alumina (Al2 O3) on the surface of the alloys. ... | 03/27/1984 |
| 4430297 | Hard nickel-base alloy resistant to wear and corrosion Disclosed is a hard wear resistant nickel based alloy including a carbide-former, preferably niobium, and essentially cobalt free but which has similar properties to cobalt, chromium, tungsten, carbon alloys. Typically the alloy has a composition, in part... | 02/07/1984 |
| 4425168 | Copper beryllium alloy and the manufacture thereof A process for producing a copper beryllium alloy. The process includes the steps of: preparing a copper beryllium melt; casting the melt; hot working the cast copper beryllium; annealing the copper beryllium; cold working the annealed copper beryllium; an... | 01/10/1984 |
| 4423014 | Solvent extraction A pregnant liquor is mixed with an organic mixture comprised of an organic extracting agent and iso-butyl-heptyl ketone. Metallic values are absorbed from the pregnant liquor by the organic mixture. The metal-bearing organic mixture is then separated from... | 12/27/1983 |
| 4417617 | Apparatus for vacuum casting of rods An apparatus for forming metal articles, such as rods and tubes by aspiration casting is provided in which a hollow frangible mold, such as a glass tube, is immersed at one end in a molten metal bath, a vacuum is applied to the other end controlled with r... | 11/29/1983 |
| 4415532 | Cobalt superalloy Disclosed is a cobalt-base superalloy containing about 32% cobalt, 8% nickel, 26.5% chromium, 2.5% tungsten, 5% niobium, about 1% each manganese and silicon, about 0.4% carbon, and the balance about 23% iron plus incidental impurities and modifiers normal... | 11/15/1983 |
| 4410489 | High chromium nickel base alloys Disclosed is a nickel-base alloy which provides excellent corrosion resistance to a variety of severe environments, especially hot phosphoric acid. The alloy preferably contains, in weight percent: about 30 chromium, about 4 molybdenum, about 2 tungsten, ... | 10/18/1983 |
| 4389462 | Process for enclosing a pin shank within an enclosing member and article produced thereby which is substantially devoid of a gap between the enclosing member and the head of the pin A composite article having particular utility as a welding stud and a process for producing the article. The article is comprised of a pin and an enclosing member formed from a dissimilar material. The pin is comprised of a head and a shank. The pin is fo... | 06/21/1983 |
| 4363659 | Nickel-base alloy resistant to wear A nickel-base alloy resistant to wear is disclosed. The alloy contains as its principal elements chromium, molybdenum, silicon, boron and carbon. The alloy, when composed of the elements in the proportions as taught, provides an outstanding combination of... | 12/14/1982 |
| 4354592 | Self-cleaning apparatus for removing material from a rotating drum Self-cleaning apparatus for removing material from a rotating drum. Buckets are associated with a scraper which is maintained in a substantially fixed position relative to the local gravitational force vector. The scraper is maintained in said position by... | 10/19/1982 |
| 4343650 | Metal binder in compaction of metal powders A method for improving the compaction characteristics of a substantially noncompactable metal powder comprising preparing a superalloy, for example, a nickel base alloy, minus a portion of at least one metal (i.e., 5 weight percent); atomizing the melt an... | 08/10/1982 |
| 4340129 | Acoustical laminate construction and attenuated systems comprising same Disclosed herein is a flexible acoustical laminate construction which can be applied to noisy enclosures in order to attenuate noise therein. The construction of the invention finds particular use as a cabliner for the cabs or crew compartments of heavy c... | 07/20/1982 |
| 4320094 | Partitioning of refractory metals from oxidation resistant scrap alloy Alloy scrap containing refractory metals such as chromium, molybdenum, tungsten, vanadium, niobium and tantalum and base metals such as nickel, cobalt, copper and iron are treated to partition the refractory metal values from the base metal values without... | 03/16/1982 |
| 4312682 | Method of heat treating nickel-base alloys for use as ceramic kiln hardware and product Disclosed is a NICRALY alloy containing nominally about 16% chromium, about 5.3% aluminum, about 0.02% yttrium and the balance essentially nickel, and heat treated in a manner to develop an essentially aluminum oxide surface. The NICRALY alloy is especial... | 01/26/1982 |
| 4305754 | Chromium recovery from scrap alloys Disclosed is a process for recovering chromium, vanadium, molybdenum, and tungsten from secondary resources such as alloy scrap comprising a refractory metal and base metals such as cobalt nickel, iron, and copper. The scrap is calcined with sodium carbon... | 12/15/1981 |
| 4298582 | Vanadium recovery from scrap alloys Disclosed is a process for recovering chromium, vanadium, molybdenum, and tungsten from secondary resources such as alloy scrap comprising a refractory metal and base metals such as cobalt, nickel, iron, and copper. The scrap is calcined with sodium carbo... | 11/03/1981 |
| 4298581 | Process for recovering chromium, vanadium, molybdenum and tungsten values from a feed material Disclosed is a process for recovering chromium, vanadium, molybdenum, and tungsten from secondary resources such as alloy scrap comprising a refractory metal and base metals such as cobalt, nickel, iron, and copper. The scrap is calcined with sodium carbo... | 11/03/1981 |
| 4293355 | Method for ultrasonically welding plasticized thermoplastic polymeric foam wares Disclosed herein is a tethered earplug construction comprising a pair of plasticized thermoplastic foam earplugs tethered together by one or more flexible plasticized thermoplastic cord elements. Attachment of the cord element to the earplug is achieved b... | 10/06/1981 |
| 4278644 | Process for partitioning Mo and W from a mixed CaMoO4 -CaWO4 precipitate Disclosed is a process for recovering chromium, vanadium, molybdenum, and tungsten from secondary resources such as alloy scrap comprising a refractory metal and base metals such as cobalt, nickel, iron, and copper. The scrap is calcined with sodium carbo... | 07/14/1981 |
| 4273566 | Method and system for the fractionation of ethane-propane mixtures Relatively high pressure mixtures consisting essentially of a major ethane component and a minor, but substantial, propane component are separated into relatively pure ethane and propane fractions by subjecting such mixtures to a number of specific coolin... | 06/16/1981 |
| 4272289 | Oxidation resistant iron base alloy articles for welding An improved oxidation resistant iron base alloy article for welding to another article to form a composite product with reduced heat affected zone cracking is provided consisting essentially of about 0.05 to 0.7% carbon, less than 0.3% columbium, about 15... | 06/09/1981 |
| 4216015 | Wear-resistant iron-nickel-cobalt alloys Disclosed is a wear-resistant Fe-Ni-Co-base alloy that is suitable for use as coatings, sintered powder metal parts, and material for application of hard-facing depositions and/or plating. The alloy preferably contains about 11% cobalt, 24% nickel, 3% eac... | 08/05/1980 |
| 4195987 | Weldable alloys Alloys containing 15-29% chromium, 12-35% iron and the balance 38-72% nickel plus cobalt as the essential major ingredients are greatly stabilized with respect to both weld crack resistance and oxidation resistance by the addition of lanthanum in effectiv... | 04/01/1980 |
| 4192983 | Methods of hard facing A method of forming a hard surfacing on a metal article is provided based upon forming a weld wire with a diffusion layer containing boron and depositing the wire on the surface to be hard surfaced by means of an electric arc to form a substantially unifo... | 03/11/1980 |
| 4191562 | Wear-resistant nickel-base alloy Disclosed is a nickel-base alloy typically containing in weight percent, about 2.7 carbon, about 10.5 cobalt, about 27 chromium, about 23 iron, about 10 molybdenum plus tungsten, up to 2.5 maximum tungsten, and the balance nickel and incidental impurities... | 03/04/1980 |
